Improvement in rubber for dental purposes



UNTTED STATES PATENT OEEIcE.

SIMEON SHERMAN, OF VESTUN, MISSOURI.

IMPROVEMENT IN ROTARY ENGINES.

Specilieation lbrming part of Letters Patent No. 58.900, dated October1li, lSfitl.

To all whom rit may concern:

Be. it known that I, VSrMEoy SHERMAN, of VVestOn, in the county ot'Platt and State of Missouri, have invented a new and Improved RotaryEngine; and I do hereby declare the following to be a full, clear, andexact description ot' the same, sutlieient to enable any one skilled inthe art to which the invention appertains to make use ot' it, referencebeing had to the accompanying drawings, in which- Figure 1 is a centralvertical longitudinal section on the line v .17, Fig. 2. Fig. 2 is anelevation on the line b l, Fig. l. Fig. 3 is a vertical section on theline c c, Fig. 1. Fig. i 1s a section on the line a a, Fig. 1. Fig. 5 isa section on the line d d, Fig. 1.

The improvement. consists in the mode of operating the abutment valve-piece, which controls the steam-passages and closes that portion ofthechamber after the piston has passed that point.

It also consists in the arrangement ot' theY condenser in directconnection with the exhaust-openings, which are guarded by the rotatingabutmentvalve.

It also consists in the arrangement oi' the enginepumps and condenser.

1n the drawings, A A are standards supgorting the main shaft, B,carrying the piston C, which has au expansible packing arrangement, D EF. The piston revolves in a chamber inside the casing G, the latterbeing supported u,by the walls ofthe condensing-cliamber ll,

and ultimately by the door I.

The segment ot' a cylinder, J, mounted on a shaft, K, and havingbearings in the casing G, is perforated for the passage ol" steam to thechamber, and acts both as a valve and an abutment.

L is the inlet-port for the passage of steam from the boiler, and M arethe passages in the valve J, by which steam is admitted to either sideby the piston C, as it may be required to run the engine in eitherdirection.

The exhaust-passages M M, on either side of the abutment-piece J,connect the steam-space in the cylinder with the condensingehamber N,which has a perforated diaphragm, 0, and a bottom, P, the latter openingautomatically I tates.

under an accumulation of water above it, and being restored to positionby the spring Q.

The water for the condei'isation ot' the steam in the chamber N isintroduced into the latter by the pipe R, which proceeds t'rom thechamber S, in which the chambered disk T ro- This disk forms the coldwater pump, and acts as a chambered valve. The water Hows in at theopening U, and a quantity equal to the aggregate capacity of thechambcred reeesses in the disk is carried forward at each revolution andpermitted to iiow through the pipe lt to thc condenser N.

The piece .T acts as a valve for the admission and emission ot' steam toand from the cylinder, aswell as acting as an abutment to close theannular steam-space at the proper times. It has a reciprocating rotarymotion produced by the alternate action of the projection V and thespring l upon the cain X, which is atA tached to the shaft K of thevalve J.

The projection V is upon the wheel Y, which latter is attached to andrevolves with the main shaft B, and as the position ot' the projectionagrees in position with the piston, thc

former, coming in contact with the cam X, rotates it, so as to removethe abutment and allow the piston to pass, as shown in Fig. 2.

As soon as the piston has passed, and the projection V has passed thccam X, the spring W on the cam restores the abutment to its positionwith one edge in contact with thcperiphery of the revolving cylindertrom which the piston projects.

The packing arrangement in the piston con sists ofthe portions 1) E F,the center piece of which comes in contact with the inner periphery ot'the steam-cylinder, the end pieces moving against the ends of thecylinder, expanded and kept in contact therewith bythe spring Z.

The corners y or hof the abutment will close the annular steamchamber atits lower portion at all times when the piston is not passing theabutment, as shown in Fig. 2.

If the piston be running, as shown in the iigures, as indicated by thered lines on the gures, the edge h, Fig. 2, will bear against thesurface ot" the internal cylinder, C, and the steam will pass in by wayofthe pipe L and through the port M of the valve J,(see red arrows inFig. 3,) While the escape-steam passes from before the piston ont oftheannular steam-chamber, by way ot' the port M, into the condenser N.(See Fig. 4.)

To reverse the engine the spring Vv' is withdrawn from the notch f, inwhich it is placed, (see Fig. 1,) and is placed in the notch s, whichhas the effect of bearing or straining the valve J in the otherdirection, so that when freed from the contact of the piston the edge g,Fig. 2, of the abutment will close the steamspace, the steam be admittedthrough the port M., and be exhausted through the port M.

The machine will be found valuable for many purposes by directattachmentof the saw, as shown in Fig.1, or the shaft ofa rotary pump,roiler, paddle, dri ring-wheel, or other mechanical device.

It will be seen that the e'ect of the steam upon the piston may bestopped by placing the spring in the notch p, when the steam is shut o'from entrance into the cylinder by inlets M or M', as is clearlyr shownin Fig. 3.

The reversal of the steam in this engine brings it to bear upon adi'erent side of the piston and is abso1nte,not depending upon thestoppage of the piston before the crank reaches its dead-point, asinreciprocating engines gcnerally, and in some rotary engines.

Having described my invention, what I claim therein as new, and desireto secure by Letters Patent, is

1. The arrangement ofthe condenser in direct connection with the twoexhauseports, guarded by a reciprocating rotary abutmentvalve.

2. The described arrangement of the rotary engine, condenser, andchambered valve T, operating as described.

SIMEON SHERMAN.

Witnesses:

EDWARD H. KNIGHT, JAS. L. EWIN.

